add35ed5b8
to check the status property in their probe routines. Simplebus used to only instantiate its children whose status="okay" but that was improper behavior, fixed in r261352. Now that it doesn't check anymore and probes all its children; the children all have to do the check because really only the children know how to properly interpret their status property strings. Right now all existing drivers only understand "okay" versus something- that's-not-okay, so they all use the new ofw_bus_status_okay() helper.
138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/*-
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* Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/ktr.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#ifdef DEBUG
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#define dprintf(fmt, args...) printf(fmt, ##args)
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#else
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#define dprintf(fmt, args...)
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#endif
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#define SIC_STATUS 0x00
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#define SIC_RAWSTAT 0x04
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#define SIC_ENABLE 0x08
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#define SIC_ENSET 0x08
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#define SIC_ENCLR 0x0C
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#define SIC_SOFTINTSET 0x10
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#define SIC_SOFTINTCLR 0x14
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#define SIC_PICENABLE 0x20
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#define SIC_PICENSET 0x20
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#define SIC_PICENCLR 0x24
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struct versatile_sic_softc {
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device_t sc_dev;
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struct resource * mem_res;
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};
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#define sic_read_4(sc, reg) \
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bus_read_4(sc->mem_res, (reg))
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#define sic_write_4(sc, reg, val) \
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bus_write_4(sc->mem_res, (reg), (val))
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static int
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versatile_sic_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (!ofw_bus_is_compatible(dev, "arm,versatile-sic"))
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return (ENXIO);
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device_set_desc(dev, "ARM Versatile SIC");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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versatile_sic_attach(device_t dev)
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{
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struct versatile_sic_softc *sc = device_get_softc(dev);
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uint32_t pass_irqs;
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int rid;
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sc->sc_dev = dev;
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/* Request memory resources */
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rid = 0;
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sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
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RF_ACTIVE);
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if (sc->mem_res == NULL) {
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device_printf(dev, "Error: could not allocate memory resources\n");
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return (ENXIO);
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}
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/* Disable all interrupts on SIC */
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sic_write_4(sc, SIC_ENCLR, 0xffffffff);
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/*
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* XXX: Enable IRQ3 for KMI
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* Should be replaced by proper interrupts cascading
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*/
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sic_write_4(sc, SIC_ENSET, (1 << 3));
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/*
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* Let PCI and Ethernet interrupts pass through
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* IRQ25, IRQ27..IRQ31
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*/
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pass_irqs = (0x1f << 27) | (1 << 25);
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sic_write_4(sc, SIC_PICENSET, pass_irqs);
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return (0);
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}
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static device_method_t versatile_sic_methods[] = {
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DEVMETHOD(device_probe, versatile_sic_probe),
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DEVMETHOD(device_attach, versatile_sic_attach),
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{ 0, 0 }
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};
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static driver_t versatile_sic_driver = {
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"sic",
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versatile_sic_methods,
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sizeof(struct versatile_sic_softc),
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};
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static devclass_t versatile_sic_devclass;
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DRIVER_MODULE(sic, simplebus, versatile_sic_driver, versatile_sic_devclass, 0, 0);
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